diff --git a/JniConstants.cpp b/JniConstants.cpp
index eb255bb..7ffcbb2 100644
--- a/JniConstants.cpp
+++ b/JniConstants.cpp
@@ -24,6 +24,7 @@
 jclass JniConstants::booleanClass;
 jclass JniConstants::byteArrayClass;
 jclass JniConstants::byteClass;
+jclass JniConstants::calendarClass;
 jclass JniConstants::characterClass;
 jclass JniConstants::charsetICUClass;
 jclass JniConstants::constructorClass;
@@ -46,6 +47,8 @@
 jclass JniConstants::methodClass;
 jclass JniConstants::mutableIntClass;
 jclass JniConstants::mutableLongClass;
+jclass JniConstants::objectClass;
+jclass JniConstants::objectArrayClass;
 jclass JniConstants::outputStreamClass;
 jclass JniConstants::parsePositionClass;
 jclass JniConstants::patternSyntaxExceptionClass;
@@ -81,6 +84,7 @@
     booleanClass = findClass(env, "java/lang/Boolean");
     byteClass = findClass(env, "java/lang/Byte");
     byteArrayClass = findClass(env, "[B");
+    calendarClass = findClass(env, "java/util/Calendar");
     characterClass = findClass(env, "java/lang/Character");
     charsetICUClass = findClass(env, "java/nio/charset/CharsetICU");
     constructorClass = findClass(env, "java/lang/reflect/Constructor");
@@ -103,6 +107,8 @@
     methodClass = findClass(env, "java/lang/reflect/Method");
     mutableIntClass = findClass(env, "libcore/util/MutableInt");
     mutableLongClass = findClass(env, "libcore/util/MutableLong");
+    objectClass = findClass(env, "java/lang/Object");
+    objectArrayClass = findClass(env, "[Ljava/lang/Object;");
     outputStreamClass = findClass(env, "java/io/OutputStream");
     parsePositionClass = findClass(env, "java/text/ParsePosition");
     patternSyntaxExceptionClass = findClass(env, "java/util/regex/PatternSyntaxException");